┌─ Escherichia coli K12 (131)  
                                                                  ┌┴─ Escherichia coli M605   
┬─────────────────────────────────────────────────────────────────┴─ Escherichia coli MS 196-1   
└─────────────────────────────────────────────────────────────────┬─ Escherichia coli (1-135/142) B088   
                                                                  └┬─ Escherichia coli (3-137/144) K12 (129)  
                                                                   └┬─ Escherichia coli (1-135/142) IAI39 (1)  
                                                                    └─ Escherichia coli (1-135/142) 2362-75   
  

  
16 kDa heat shock protein A
 (4)
  
16 kDa heat shock protein B
 (3)